Direct answer
South Africa DC protection RFQs should define PV string voltage, rated current, pole count, breaking capacity, SPD type and whether devices are loose or installed inside a combiner box.
Because backup solar and storage projects often combine PV, inverter and battery circuits, DC protection should be checked together with cable, connectors, combiner boxes and AC-side protection.
Core procurement parameters
| Common products | DC MCB, DC MCCB, DC SPD, PV fuse holder, isolator |
|---|---|
| Project fit | Residential backup solar, C&I rooftops, distributor stock |
| Voltage class | 600V, 1000V or 1500V depending on project architecture |
| RFQ focus | DC rating, breaking capacity, enclosure and label requirements |
Applications
- Backup solar systems
- PV string protection
- Combiner box assemblies
- Distributor electrical BOS stock
Available options
- Loose protection devices
- Combiner box assembly
- Custom label request
- Mixed BOS shipment
QC points before shipment
Check DC voltage marking
Verify device rating
Inspect enclosure fit
Review wiring diagram if assembled
FAQ
Can OmniSol quote DC protection with combiner boxes?
Yes. DC protection devices can be quoted loose or integrated into PV combiner boxes when the wiring layout is clear.
Can AC breakers be used for solar DC circuits?
No. DC PV circuits need devices specifically rated for the required DC voltage and breaking capacity.